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By: Müller, Joseph, - Naturhistorischer Verein der preussischen Rheinlande und Westfallens.Edition:Publication info: Bonn, in Kommission bei Henry & Cohen, 1847-1859Volume: v.1-3(1847-1859)Series:Holding Institution: Natural History Museum Library, LondonSubjects: Aachen Aachen, Germany Aix-la-Chapelle Cretaceous Germany Palaeontology PrussiaBHL Collections:
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By: Böhm, Johannes,Edition:Publication info: Bonn, Universitäts-Buchdruckerei von C. Georgi, 1885Volume:Series:Holding Institution: Harvard University, Museum of Comparative Zoology, Ernst Mayr LibrarySubjects: Aachen Germany Greensand Mollusks, Fossil PaleontologyBHL Collections: